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Interactions of Mercury with Dissolved Organic Carbon in the Florida Everglades

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Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator:
George Aiken

Dave Krabbenhoft, Orem, Bill

Publication_Date: 2005
Title:
Interactions of Mercury with Dissolved Organic Carbon in the Florida Everglades
Geospatial_Data_Presentation_Form: text files
Online_Linkage: <http://sofia.usgs.gov/projects/merc_carbon>
Description:
Abstract:
This project is designed to more clearly define the factors that control the occurrence, nature, and reactivity of dissolved organic matter (DOM) in the Florida Everglades, especially with regard to the biological transformation and accumulation of mercury (Hg). The primary objectives of our research are (1) to more clearly define the factors that control the occurrence, nature and reactivity of dissolved organic matter (DOM) in the Florida Everglades, and (2) to quantify the effects of DOM on the transport and reactivity of Hg, especially with regard to the biological transformation and accumulation of mercury (Hg) in the Everglades.

To meet these objectives, we have adopted a combined field/ laboratory approach. In conjunction with other research projects our field efforts are designed (1) to characterize DOM at a variety of field locations chosen to provide information about the influences of hydrology, seasonal factors (wetting and drying events) and source materials (e.g. vegetation, periphyton, peat) on the nature and amount of DOM in the system, and (2) to elucidate the roles of DOM in controlling the reactivity and bioavailability of Hg in the Everglades.

Purpose:
This research is relevant because of the high natural production of organic carbon in the peat soils and wetlands, the relatively high carbon content of shallow ground water systems in the region, the interactions of organic matter with other chemical species, such as trace metals, divalent cations, mercury, and anthropogenic compounds, the accumulation of organic carbon in corals and carbonate precipitates, and the potential changes in the quality and reactivity of dissolved organic carbon (DOC) resulting from land use and water management practices. Proposed attempts to return the Everglades to more natural flow conditions will result in changes to the current transport of organic matter from the Everglades Agricultural Area and the northern conservation areas to Florida Bay. In addition, the presence of dissolved organic matter is important in the production of drinking water, contributes to pollutant transport, and will influence ASR performance. Finally, interactions of mercury (Hg) with organic matter play important roles in controlling the reactivity, bioavailability and transport of Hg in the Everglades.
Supplemental_Information:
This project is part of the Integrated Biogeochemical Studies in the Everglades.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 199503
Ending_Date: 2006
Currentness_Reference: ground condition
Status:
Progress: In Work
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -80.891142
East_Bounding_Coordinate: -80.102985
North_Bounding_Coordinate: 26.78571
South_Bounding_Coordinate: 25.597272
Keywords:
Theme:
Theme_Keyword_Thesaurus: none
Theme_Keyword: mercury
Theme_Keyword: dissolved organic carbon
Theme_Keyword: DOC
Theme_Keyword: dissolved organic matter
Theme_Keyword: DOM
Theme_Keyword: hydrology
Theme_Keyword: chemistry
Theme_Keyword: biochemistry
Theme_Keyword: biogeochemistry
Theme_Keyword: mercury contamination
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: environment
Theme_Keyword: inlandWaters
Theme_Keyword: 007
Theme_Keyword: 012
Place:
Place_Keyword_Thesaurus:
Department of Commerce, 1995, Countries, Dependencies, Areas of Special Sovereignty, and Their Principal Administrative Divisions, Federal Information Processing Standard (FIPS) 10-4, Washington, D.C., National Institute of Standards and Technology
Place_Keyword: United States
Place_Keyword: US
Place:
Place_Keyword_Thesaurus:
U.S. Department of Commerce, 1987, Codes for the identification of the States, the District of Columbia and the outlying areas of the United States, and associated areas (Federal Information Processing Standard 5-2): Washington, D. C., NIST
Place_Keyword: Florida
Place_Keyword: FL
Place:
Place_Keyword_Thesaurus:
Department of Commerce, 1990, Counties and Equivalent Entities of the United States, Its Possessions, and Associated Areas, FIPS 6-3, Washington, DC, National Institute of Standards and Technology
Place_Keyword: Broward County
Place_Keyword: Miami-Dade County
Place_Keyword: Palm Beach County
Place:
Place_Keyword_Thesaurus: none
Place_Keyword: Central Everglades
Place_Keyword: WCA2
Place_Keyword: WCA3
Place_Keyword: Water Conservation Area 2
Place_Keyword: Water Conservation Area 3
Access_Constraints: none
Use_Constraints:
None. Acknowledgement of the U.S. Geological Survey would be appreciated for products derived from these data.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: George Aiken
Contact_Organization: U.S. Geological Survey
Contact_Position: Project chief
Contact_Address:
Address_Type: mailing address
Address: 3215 Marine Street, Suite E-127
City: Boulder
State_or_Province: CO
Postal_Code: 80303
Contact_Voice_Telephone: 303 541-3036
Contact_Facsimile_Telephone: 303 447-2505
Contact_Electronic_Mail_Address: graiken@usgs.gov
Browse_Graphic:
Browse_Graphic_File_Name: <http://sofia.usgs.gov/exchange/aiken/locationwq.html>
Browse_Graphic_File_Description: Everglades Water Quality Data Location Map
Browse_Graphic_File_Type: JPEG
Browse_Graphic:
Browse_Graphic_File_Name: <http://sofia.usgs.gov/exchange/aiken/locationchem.html>
Browse_Graphic_File_Description: Everglades Water Chemistry Data Location Map
Browse_Graphic_File_Type: JPEG
Data_Set_Credit:
FY 2003 - 2004 project personnel include Jarrod Gasper and Kenna Butler. Previous project personnel include Michael Reddy, Paul Schuster, James Weishaar, Jason Tregellas, and Janece Koleis.
Cross_Reference:
Citation_Information:
Originator:
Haitzer, M.

Aiken, G. R., Ryan, J. N.

Publication_Date: 2002
Title:
Binding of Mercury (II) to Dissolved Organic Matter: The Role of the Mercury-to-DOM Concentration Ration
Geospatial_Data_Presentation_Form: paper
Series_Information:
Series_Name: Environmental Science and Technology
Issue_Identification: v. 36
Publication_Information:
Publication_Place: Washington, DC
Publisher: American Chemical Society
Other_Citation_Details:
The entire paper is available from the Environmental Science and Technology Journal web site; however, a journal subscription is required.
Online_Linkage: <http://sofia.usgs.gov/publications/papers/hg_dom_binding/>
Cross_Reference:
Citation_Information:
Originator:
Benoit, J. M.

Mason, R. P., Gilmour, C. C., Aiken, G. A.

Publication_Date: 2001
Title:
Constants for Mercury Binding by Dissolved Organic Matter Isolates form the Florida Everglades
Geospatial_Data_Presentation_Form: paper
Series_Information:
Series_Name: Geochimica Et Cosmochimica Acta
Issue_Identification: v. 65 no. 24
Publication_Information:
Publication_Place: Oxford, United Kingdom
Publisher: Geochemical Society (Elsevier Science, Ltd.)
Online_Linkage: <http://sofia.usgs.gov/publications/papers/k_hgbinding>
Cross_Reference:
Citation_Information:
Originator:
Ravichandran, M

Aiken, G. R., Ryan, J. N., Reddy, M. M.

Publication_Date: 1998
Title:
Enhanced Dissolution of Cinnabar (Mercuric Sulfide) by Dissolved Organic Matter Isolated from the Florida Everglades
Geospatial_Data_Presentation_Form: paper
Series_Information:
Series_Name: Environmental Science and Technology
Issue_Identification: v. 32
Publication_Information:
Publication_Place: Washington, DC
Publisher: American Chemical Society
Other_Citation_Details:
Entire paper is available from the Environmental Science and Technology website at <http://pubs.acs.org/journals/esthag/index.html>. Journal membership is required for download.
Online_Linkage: <http://sofia.usgs.gov/publications/papers/dislncinnabar>
Cross_Reference:
Citation_Information:
Originator:
Reddy, M. M.

Aiken, G. R.

Publication_Date: 2001
Title:
Fulvic acid-sulfide ion competition for mercury ion binding in the Florida Everglades
Geospatial_Data_Presentation_Form: paper
Series_Information:
Series_Name: Water, Air and Soil Pollution
Issue_Identification: v. 132
Publication_Information:
Publication_Place: Dordrecht, Netherlands
Publisher: Kluwer Academic Publishers
Online_Linkage: <http://sofia.usgs.gov/publications/papers/fulvicacid>
Cross_Reference:
Citation_Information:
Originator:
Drexel, R. Todd

Haitzer, Markus, Ryan, Joseph N., Aiken, George R., Nagy, Kathlyn L.

Publication_Date: 2002
Title:
Mercury (II) Sorption to Two Florida Everglades Peats: Evidence for Strong and Weak Binding and Competition by Dissolved Organic Matter Released from the Peat
Geospatial_Data_Presentation_Form: paper
Series_Information:
Series_Name: Environmental Science and Technology
Issue_Identification: v. 36 no.19
Publication_Information:
Publication_Place: Washington, DC
Publisher: American Chemical Society
Other_Citation_Details:
Entire paper is available from the Environmental Science and Technology website at <http://pubs.acs.org/journals/esthag/index.html>. Journal membership is required for download.
Cross_Reference:
Citation_Information:
Originator:
Reddy, Michael M.

Aiken, George R., Schuster, Paul F., Gunthers, Charmaine

Publication_Date: 1995
Title:
Summary of Data from Onsite and Laboratory Analyses of Surface Water and Marsh Porewater from South Florida Water Management District Conservation Areas, the Everglades, South Florida
Geospatial_Data_Presentation_Form: paper
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Other_Citation_Details:
Prepared in cooperation the South Florida Water Management Districyt and the U.S. Environmental Protection Agency
Online_Linkage: <http://sofia.usgs.gov/publications/reports/merc_carbon>
Cross_Reference:
Citation_Information:
Originator:
Bates, A. L.

Orem, W. H., Harvey, J.. W., Spiker, E. C.

Publication_Date: 2001
Title:
Geochemistry of Sulfur in the Florida Everglades: 1994 through 1999
Geospatial_Data_Presentation_Form: report
Series_Information:
Series_Name: USGS Open-File Report
Issue_Identification: OFR 01-007
Publication_Information:
Publication_Place: Tallahassee, FL
Publisher: U.S. Geological Survey
Online_Linkage: <http://sofia.usgs.gov/publications/ofr/01-007/>
Cross_Reference:
Citation_Information:
Originator:
Orem, William H.

Lerch, Harry E., Rawlik, Peter

Publication_Date: 1997
Title:
Geochemistry of Surface and Pore Water at USGS Coring Sites in Wetlands of South Florida: 1994 and 1995
Geospatial_Data_Presentation_Form: report
Series_Information:
Series_Name: USGS Open-File Report
Issue_Identification: OFR 97-454
Publication_Information:
Publication_Place: St. Petersburg, FL
Publisher: U.S. Geological Survey
Online_Linkage: <http://sofia.usgs.gov/publications/ofr/97-454>
Cross_Reference:
Citation_Information:
Originator:
Bates, Anne L

Orem, William H., Harvey. Judson W., Spiker, Elliot C.

Publication_Date: 2002
Title: Tracing sources of sulfur in the Florida Everglades
Geospatial_Data_Presentation_Form: report
Series_Information:
Series_Name: Journal of Environmental Quality
Issue_Identification: v. 31 no. 1
Publication_Information:
Publication_Place: Madison, WI
Publisher: American Society of Agronomy
Other_Citation_Details:
The journal is published jointly by the American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America
Online_Linkage: <http://sofia.usgs.gov/publications/reports/trace_sulfur/>
Cross_Reference:
Citation_Information:
Originator:
Hoch, A. R.

Reddy, M. M., Aiken, G. R.

Publication_Date: 2000
Title:
Calcite Crystal Growth Inhibition by Humic Substances with Emphasis on Hydrophobic Acids from the Florida Everglades
Geospatial_Data_Presentation_Form: report
Series_Information:
Series_Name: Geochimica et Cosmochimica Acta
Issue_Identification: v. 64
Publication_Information:
Publication_Place: New York, NY
Publisher: Elsevier Science Ltd.
Other_Citation_Details:
Please contact George Aiken at graiken@usgs.gov for a copy of this paper.
Cross_Reference:
Citation_Information:
Originator:
Krabbenhoft, D. P.

Hurley, J. P., Aiken, G. R., Marvin-DiPasquale, M., Orem, W. H., Harris, R.

Publication_Date: 2000
Title:
Mercury Cycling in the Florida Everglades: A Mechanistic Field Study
Geospatial_Data_Presentation_Form: report
Series_Information:
Series_Name: Verh. Internat. Verein. Limnol.
Issue_Identification: v. 27
Publication_Information:
Publication_Place: Stuttgart, Germany
Publisher: E. Scheizerbart'sche Verlagsbuchhandlung
Other_Citation_Details:
Please contact George Aiken at graiken@usgs.gov for a copy of this paper.
Cross_Reference:
Citation_Information:
Originator:
Ravichandran, M.

Aiken, G. R., Ryan, J. N., Reddy, M. M.

Publication_Date: 1999
Title:
Inhibition of precipitation and aggregation of Metacinnabar (mercuric sulfide) by dissolved organic matter isolated from the Florida Everglades
Geospatial_Data_Presentation_Form: report
Series_Information:
Series_Name: Environmental Science and Technology
Issue_Identification: v. 33, n. 9
Publication_Information:
Publication_Place: Washington, DC
Publisher: American Chemical Society
Other_Citation_Details:
Entire paper is available from the Environmental Science and Technology website at <http://pubs.acs.org/journals/esthag/index.html>. Journal membership is required for download.
Online_Linkage: <http://sofia.usgs.gov/publications/papers/inhibitnagg>
Cross_Reference:
Citation_Information:
Originator:
Haitzer, Markus

Aiken, George R., Ryan, Joseph N.

Publication_Date: 2003
Title:
Binding of Mercury (II) to Aquatic Humic Substances: Influence of pH and Source of Humic Substances
Geospatial_Data_Presentation_Form: report
Series_Information:
Series_Name: Environmental Science and Technology
Issue_Identification: v. 37, n. 11
Publication_Information:
Publication_Place: Washington, DC
Publisher: Americal Chemical Society
Other_Citation_Details:
Entire paper is available from the Environmental Science and Technology website at <http://pubs.acs.org/journals/esthag/index.html>. Journal membership is required for download.
Online_Linkage: <http://sofia.usgs.gov/publications/papers/bind_hg_humic>
Cross_Reference:
Citation_Information:
Originator: Bock, W. D.
Publication_Date: 1971
Title:
A handbook of the benthonic foraminifera of Florida Bay and adjacent waters
Geospatial_Data_Presentation_Form: book
Series_Information:
Series_Name: Memoir
Issue_Identification: 1
Publication_Information:
Publication_Place: Miami, FL
Publisher: Miami Geological Society
Cross_Reference:
Citation_Information:
Originator: Poag, C. W.
Publication_Date: 1981
Title: Ecological Atlas of Benthic Foraminifers of the Gulf of Mexico
Geospatial_Data_Presentation_Form: book
Publication_Information:
Publication_Place: Stroudsburg, PA
Publisher: Hutchinson and Ross
Cross_Reference:
Citation_Information:
Originator: Wardlaw, Bruce, editor
Publication_Date: 2001
Title: Paleoecological Studies of South Florida
Geospatial_Data_Presentation_Form: report
Series_Information:
Series_Name: Bulletins of American Paleontology
Issue_Identification: 361
Publication_Information:
Publication_Place: Ithica, NY
Publisher: Paleontological Research Institution

Data_Quality_Information:
Logical_Consistency_Report: not applicable
Completeness_Report: not available
Lineage:
Process_Step:
Process_Description:
During Phase 1, we studied the distribution and nature of dissolved organic matter (DOM) in the northern Everglades. In this work we noted the importance of source materials (peat versus vegetation and periphyton), and the importance of hydrologic factors on the quality and amount of DOM in a given location. Differences in the DOM were clearly apparent in regions e exhibiting different behavior with regard to the generation of methylmercury.

We also studied the reactivity of Everglades DOM with mercury through cinnabar (HgS) dissolution and formation experiments, and an ion-exchange technique designed to yield information on Hg-DOM binding constants.

Process_Date: 1999
Process_Step:
Process_Description:
Progress was made in FY 2000 in both the field and laboratory experiments. In the field, mesocosms were deployed at select locations to be used in experiments designed to test hypotheses concerning Hg speciation and reactivity. Preliminary experiments were carried out in conjunction with other team members. As part of this effort, we collected water from the F1 site (80.37 W, 26.36 N) and isolated a large amount of organic matter for future mesocosm experiments and to provide organic matter for ongoing lab experiments assessing the interactions of Hg with DOM that may control bioavailability.

We continued ongoing lab studies to better define interactions of Hg with Dissolved Organic Matter (DOM). These included:

1. Binding studies (Hg-DOM). Ion-exchange studies designed to measure the strength of interactions between Hg and DOC were continued, and, new techniques to assess factors controlling reactivity of DOM with Hg and the strength of binding interactions were investigated. This work is important for accurate modeling of these interactions.

2. Study of the interactions of the DOM with HgS. Experiments were designed to provide insight into ability of DOM to stabilize colloidal HgS. This is a potentially significant process effecting the bioavailability of Hg.

3. The study of the "partitioning" of Hg between dissolved and particulate phases was completed. Field based partitioning coefficients, necessary for accurately modeling Hg behavior in the Everglades, were corroborated.

Process_Date: 2000
Process_Step:
Process_Description:
The planned work in FY 2001 included:

1. Continue work using field based mesocosms to address issues concerning partitioning and reactivity of Hg in the Everglades with regard to the roles played by DOM in the system. We plan to continue overall project support with regard to DOM analyses and isolate availability for experimentation.

2. Laboratory development of abiotic methods for assessing bioavailability of Hg will be completed, and we anticipate using these techniques in the field.

3. Lab based studies on DOM-Hg binding constants will likely be completed in FY 2002. This includes studies with cinnabar and ion exchange and dialysis techniques for estimating binding constants with Hg. Concerning the latter techniques, we plan to employ these methods to assess interactions between CH3Hg+and OM in the system. These interactions could prove to be important controls on bioavailability of CH3Hg+ in the system.

4. In lab based studies to be carried out in conjunction with Bill Orem, we plan to investigate the interactions of OM and inorganic S in the Everglades. This work will attempt to investigate the role of sulfate anion interactions with both DOM and particulate organic matter (POM). The organic-S in the DOM and the peat are of interest both in regard to binding of Hg and as a potential source of sulfate during oxidation and remineralization of organic matter. We have strong evidence from Phase 1 studies that remineralization can provide significant contributions of sulfate to the porewaters.

Process_Date: 2001
Process_Step:
Process_Description:
Work planned for FY 2003 and FY 2004 includes:

Interactions of DOM with Hg in the Everglades

1. Continue lab-based studies on DOM-Hg binding constants. We have recently completed development of dialysis technique for measuring binding constants. This method is the only reliable method we have found for measuring binding constants. Development was carried out using hydrophobic sample from F1 field site. The method now needs to be used with other fractions of the DOM from F1 and other locations in the Everglades and the method should be extended for measuring DOM-MeHg binding constants.

2. Continue lab-based studies on the interactions of DOM with HgS. HgS is assumed to be an important species controlling Hg bioreactivity. Greater definition of DOM-HgS interactions is critical for understanding factors that control methylation of Hg. We previously demonstrated the strong influence of DOM on the chemistry of HgS complexes, although the processes are poorly defined. Efforts in FY 03 and FY 04 will provide data to better understand these processes and assess the role they play in controlling Hg bioavailability.

Effects of DOM on Hg cycling in the Florida Everglades

1. Continue work using field based mesocosms to address issues concerning partitioning and reactivity Hg in the Everglades with regard to the roles played by DOM in the system. Mesocosm experiments have been very successful demonstrating the influence of DOM on methylation and bioaccumulation of Hg. In this work organic matter isolated from areas with reactive DOM is added to mesocosms, in addition to other constituents (sulfate, Hg) to assess impacts on Hg partitioning, methylation and bioaccumulation.

2. Continue work assessing the roles of drying and wetting of peat soils on the generation of DOM and MeHg. Research is both lab and field based. DOM concentrations and changes in the reactivity of the DOM are determined as a function of wetting and drying, a common natural condition and one of great importance in managed wetlands, such as the Storm Treatment Areas (STA). DOM characterization methods established by USGS labs are used.

3. Begin study of DOM in Lake Okeechobee and Kissimmee River. This work is important for future efforts involving ASR. DOM sampling and characterization methods have been established by USGS labs.

4. Begin study of DOM in new Storm Treatment Areas ( STA’s). The STAs are critical for restoration efforts. DOM characterization methods established by USGS labs will be used.

5. Continue assessment of water quality changes in Everglades by participation in ACME Site Survey work. This is done in conjunction with Krabenhoft and Orem. This project is responsible for DOM measurements and characterization throughout the Everglades.

Process_Date: Not complete
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: George Aiken
Contact_Organization: U.S. Geological Survey
Contact_Position: Project chief
Contact_Address:
Address_Type: mailing address
Address: 3215 Marine Street, Suite E-127
City: Boulder
State_or_Province: CO
Postal_Code: 80303
Contact_Voice_Telephone: 303 541-3036
Contact_Facsimile_Telephone: 303 447-2505
Contact_Electronic_Mail_Address: graiken@usgs.gov

Spatial_Data_Organization_Information:
Indirect_Spatial_Reference: Everglades

Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Heather S.Henkel
Contact_Organization: U.S. Geological Survey
Contact_Address:
Address_Type: mailing address
Address: 600 Fourth St. South
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA
Contact_Voice_Telephone: 727 803-8747 ext 3028
Contact_Facsimile_Telephone: 727 803-2030
Contact_Electronic_Mail_Address: hhenkel@usgs.gov
Resource_Description: Everglades water chemistry - cations and anions
Distribution_Liability: The data have no explicit or implied guarantees.
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Computer_Contact_Information:
Network_Address:
Network_Resource_Name: <http://sofia.usgs.gov/exchanget/graiken/table5c.csv>
Access_Instructions: Log onto the SOFIA website at <http://sofia.usgs.gov>
Fees: none

Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Heather S.Henkel
Contact_Organization: U.S. Geological Survey
Contact_Address:
Address_Type: mailing address
Address: 600 Fourth St. South
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA
Contact_Voice_Telephone: 727 803-8747 ext 3028
Contact_Facsimile_Telephone: 727 803-2030
Contact_Electronic_Mail_Address: hhenkel@usgs.gov
Resource_Description: Everglades DOC data
Distribution_Liability: The data have no explicit or implied guarantees.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: ASCII
Format_Version_Date: 1985
Format_Information_Content:
ASCII file of the complete lists of Global Positioning System points reformatted for input into an ARC/INFO point cover
Digital_Transfer_Option:
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Computer_Contact_Information:
Network_Address:
Network_Resource_Name: <http://sofia.usgs.gov/exchanget/graiken/table5d.csv>
Access_Instructions: Log onto the SOFIA web site at <http://sofia.usgs.gov>
Fees: none

Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Heather S.Henkel
Contact_Organization: U.S. Geological Survey
Contact_Address:
Address_Type: mailing address
Address: 600 Fourth St. South
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA
Contact_Voice_Telephone: 727 803-8747 ext 3028
Contact_Facsimile_Telephone: 727 803-2030
Contact_Electronic_Mail_Address: hhenkel@usgs.gov
Resource_Description: Everglades water quality - field parameters
Distribution_Liability: The data have no explicit or implied guarantees.
Standard_Order_Process:
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Format_Name: ASCII
Format_Version_Date: 1985
Format_Information_Content:
The file contains a comma-delimited complete list of Global Positioning System (GPS) points
Digital_Transfer_Option:
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Computer_Contact_Information:
Network_Address:
Network_Resource_Name: <http://sofia.usgs.gov/exchanget/graiken/table5b.csv>
Access_Instructions: Log onto the SOFIA website at <http://sofia.usgs.gov>
Fees: none

Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Heather S.Henkel
Contact_Organization: U.S. Geological Survey
Contact_Address:
Address_Type: mailing address
Address: 600 Fourth St. South
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA
Contact_Voice_Telephone: 727 803-8747 ext 3028
Contact_Facsimile_Telephone: 727 803-2030
Contact_Electronic_Mail_Address: hhenkel@usgs.gov
Resource_Description: Everglades water quality - site & sample information
Distribution_Liability: The data have no explicit or implied guarantees.
Standard_Order_Process:
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Computer_Contact_Information:
Network_Address:
Network_Resource_Name: <http://sofia.usgs.gov/exchanget/graiken/table5a.csv>
Access_Instructions: Log onto the SOFIA website at <http://sofia.usgs.gov>
Fees: none

Distribution_Information:
Distributor:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Heather S.Henkel
Contact_Organization: U.S. Geological Survey
Contact_Address:
Address_Type: mailing address
Address: 600 Fourth St. South
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA
Contact_Voice_Telephone: 727 803-8747 ext 3028
Contact_Facsimile_Telephone: 727 803-2030
Contact_Electronic_Mail_Address: hhenkel@usgs.gov
Resource_Description:
Surface Water DOC, Pore Water DOC, and Specific ultraviolet absorbance (SUVA) data
Distribution_Liability: The data have no guarantees explicit or implied
Standard_Order_Process:
Digital_Form:
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Format_Version_Number: unknown
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Computer_Contact_Information:
Network_Address:
Network_Resource_Name: <http://sofia.usgs.gov/exchange/aiken/aikenchem.html>
Access_Instructions: Data can be downloaded from the SOFIA website
Fees: none

Metadata_Reference_Information:
Metadata_Date: 20070126
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Heather Henkel
Contact_Organization: U.S. Geological Survey
Contact_Address:
Address_Type: mailing and physical address
Address: 600 Fourth Street South
City: St. Petersburg
State_or_Province: FL
Postal_Code: 33701
Country: USA
Contact_Voice_Telephone: 727 803-8747 ext 3028
Contact_Facsimile_Telephone: 727 803-2030
Contact_Electronic_Mail_Address: sofia-metadata@usgs.gov
Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998

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